static type_t s_type_event_new (const char *name, type_t father);
static type_t s_type_variable_new (const char *name, const char *color, type_t father);
static type_t s_type_link_new (const char *name, type_t father, type_t source, type_t dest);
static type_t s_type_event_new (const char *name, type_t father);
static type_t s_type_variable_new (const char *name, const char *color, type_t father);
static type_t s_type_link_new (const char *name, type_t father, type_t source, type_t dest);